Study on Optimum Frequency for Eddy Current Testing of Tubes by Numerical Modeling and Experimental Verification
摘 要
目前广泛采用的确定涡流探伤频率的方法主要是特征频率法和试验法,两种方法得出的频率通常不是最佳频率。采用ANSYS数值计算方法对人工标准缺陷的信号进行数值模拟,从而找出对内外壁缺陷信号的幅度都比较大,并且内外壁缺陷信号的相位差接近极大的激励频率。经过试验验证,计算结果与试验结果完全符合。结论认为,用ANSYS信号模拟方法可以找出最佳的激励频率,既能兼顾内外壁缺陷的检测灵敏度,又能从相位上区分内外壁缺陷的激励频率。
Abstract
The characteristic frequency and experimental methods are widely used at present for selection of exciting frequencies with which eddy current NDT of tubes are conducted. The methods are not accurate enough for finding the optimum frequency. The frequencies selected by the methods are always a little far from the optimum. A new method based on numerical modeling of flaw signals with ANSYS was developed. In this way the optimum exciting frequency was found. The optimum means that both the signals from ID and OD artificial defects were higher and the difference between the phases of the two signals reached nearly the maximum. The experiments of eddy current NDT on tubes with the ID and OD artificial defects were conducted. The results of the experiments agreeed with those of numerical modeling very well. It was concluded that the new method was accurate enough for finding the optimum exciting frequency.
中图分类号 TG115.28
所属栏目 科研成果与学术交流
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收稿日期 2008/4/25
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备注蔡桂喜(1965-),男,研究员,从事无损检测研究。
引用该论文: CAI Gui-Xi,DUAN Jian-Gang,CHEN Jun,Meng Xian-Hong. Study on Optimum Frequency for Eddy Current Testing of Tubes by Numerical Modeling and Experimental Verification[J]. Nondestructive Testing, 2009, 31(5): 333~336
蔡桂喜,段建刚,陈军,孟宪红. 管材涡流探伤最佳频率数值模拟与试验验证[J]. 无损检测, 2009, 31(5): 333~336
被引情况:
【1】付检平,沈功田,于润桥,胡斌, "304奥氏体不锈钢涡流检测频率的优化",无损检测 35, 8-12(2013)
【2】李冬,林俊明,许贵平,黄海翔,高三杰,王晓磊,李恒羽,党辉,于军辉, "锆合金管材涡流检测缺陷的轴向定位",无损检测 38, 31-35(2016)
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参考文献
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【2】Palanisamy R, Lord W. Finite element analysis of eddy current phenomena[J]. Materials Evaluation,1980,38(10):39-43.
【3】Ida N, Palanisamy R, Lord W. Eddy current probe design using finite element analysis[J]. Materials Evaluation,1983,41(11):1389-1394.
【4】廖述圣,聂 勇,张黎明,等.核电站蒸汽发生器传热管涡流信号的有限元仿真[J].无损检测,2007,29(1):6-8.
【5】孙朝明,徐彦林,刘 宝.有限元方法用于涡流电磁场计算的有效性分析[J].无损检测,2006,28(11):561-565.
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